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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a balance adjusting
device in a stereo amplifier according to the present invention, FIG. 1 is a perspective view
showing a part of the stereo amplifier, and FIG. 2 is a speaker and a sound field. And FIG. 3 is a
circuit diagram. In the figure, 11 to 14 are signal input terminals, 21 to 24 are preamplifiers, 31
to 34 are balance adjustment volumes, 41 to 44 are volume adjustment volumes, 51 to 54 are
main amplifiers, 61 to 64 are speakers, T is It is a four-circuit switch. 2 18-5 real open 48-50003
(2) 22 屏 25 R -6-
Detailed description of the invention The present invention relates to a balance adjustment
device in stereo, 4IK 4 channel stereo #C 6 ° 4i-5 °. . In the case of many stereo amplifiers
provided with a balance volume in addition to the volume volume, the balance is first adjusted
and then the volume is adjusted, and the sound field is determined by the operation b5. By the
way, although the modification of the sound field in the case of the two channel stereo described
above is relatively easy, the sound h "tyR1 j in the case of four channels! It was very cumbersome
and time-consuming. l! A total of four left and right sides of the left and right of the rear odor
are provided for the balance and 1I4u for fron adjustment, so that the balance adjustment is
performed by operating the four pieces. Therefore, when the level of 46i is manipulated to
disturb the center of the sound field at the intersection of the dotted lines in Fig. 2 when the level
of the sound field is crossed (the layer pressure from each speaker is all equal) In order to move
to the center, it is necessary to adjust the Fi 4 volume adjustment knobs, which is troublesome
for sweeping, and even if each knob is centered, the difference in volume between the volume
and the center of the sound field It was doubtful whether it was a true center or not. The present
invention was made focusing on a point on the boat, and it is a balance adjusting device in a
stereo amplifier that can move the center of the sound field by the position of the intersection of
the diagonal line of the speaker by one touch operation. I will try to provide. Also 9! ! Another
purpose of the scheme is to move the center of the sound field to I5 in the balance by adding
only one switch, and the balance adjustment in the stereo amplifier which does not become so
complicated and the circuit does not become so complicated @ There is to offer snow. Next, one
embodiment of the present invention, t5! lffIC,? In the case of (1) j, (4) aQ 41 has four
different signals applied at the signal input terminal. (2) (2) tIs プ リ ア ン プ is a preamplifier,
(−) (ml) (→ (菖) heat balance adjusting polynemeth), one end is connected to the preamplifier (至
) to 鱒, and the other end is connected to the ground. (One end of the volume adjustment volume
is 41X → (呻 (4M) and 4 series of volume adjustment, and the sliding end of the lance
adjustment layer polyneme (31>-(b) is covered and the other end is grounded It is connected to
the. Cm) C → (II) (84) is a preamplifier, 伽) H (伽) (b) is a speaker, and the above-mentioned
configuration is conventionally known. And in this invention 4 [! ! Each contact (n) (ml) (W) (74)
is used with a switch (7) of the l path 2 contact, and each contact (n (→ (→ (→ Connect to the
connection with the end i.
Based on the above-described structure, the action 4B-50003-05 will now be described. K for
locating the center of the intersection K11FyA in the dotted line in FIG. 2 is the same as in the
conventional method. The adjustment is performed by adjusting the balance adjustment volumes
(31) to (34), and at this time, the switch 1 Fi Fi is opened. Next, the KFi switch +71 is moved to
move it closed by moving the KFi switch +71 that moves the point of intersection of the tentative
6M in the center t # f2 of the sound field (the position of the four speakers (at the point of
intersection on 4 diagonal lines)) You can do it. 120: All the balance adjustment volumes (11)-('4)
are the respective contacts (n) of the switch (7) The signals ˜ (short circuited by 殉, preamp θ
libe → y) are directly volume-controlled volume (41)-(44) Kffla. In this case, since the volume
adjustment volume (4x) is a quadruple volume, its resistance values are all equal, and therefore it
is emitted from the speaker (magnetic) 48-50003-0654. Sound pressure is all equal. J: In the
example described in the above, I explained about the balance adjustment ° and the one with
four knobs k, but recently IK has changed the center of the sound field by operating one lever In
this pigeon house, the center of the sound field is in balance even if it moves around the lever
due to the resistance value error of each polyneme and the error of the mechanism connecting
the lever and the volume. It is effective to connect the switch (7) according to the present
invention to a balance adjusting device by lever operation not only in point. Also, in the above
embodiment, although the description is given with respect to the 4-channel amplifier, it goes
without saying that the present invention can be applied to the 2-channel amplifier. 48-5000307 Each of the balance adjustment polys as described above. A multicircuit switch for shorting
between neems is provided, and if necessary, the balance adjustment volume is shorted 2 and the
signal is directly transmitted to the volume WR adjustment polymes k, so that the center of the
sound field is achieved by one touch. Because the sound pressure of the speaker can be changed
to the same position, it is particularly effective to not perform balance adjustment constantly, and
it is particularly effective, and it also serves as a balance so-called short circuit 5 and a balun 1,
by Dial adjustment, 1 sound field center 2. Tsuyu. In addition to being able to prevent the
deviation of the midpoint due to the resistance value error of the proper balance adjustment
volume in the case of combining the midpoint and □ °, it is possible to well achieve the
intended purpose. The explanation of the tm plane is given to the stereo amplifier according to
the present invention by τ-5 °. .
Fig. 1 is a perspective view showing a part of a stereo amplifier according to an embodiment of
the 3-o 82 norance adjustment device according to an embodiment of the present invention, Fig.
2 is an l12 clear view showing a relationship between a sliding force and a sound field, Fig. 5 Is a
circuit diagram. In the figure, all-64 is a signal input terminal, 縛 is a preamplifier, (groups) to (at)
Fi balance adjustment volume,) (41) to @) is a volume adjustment polyplane -1, ()) (54) is a main
amplifier, (gl) to (64) is a speaker, +71 Fi4! 1 circuit □ b. . Cある。 ξ [Utility model registration
H people Pioneer Inc. Agent Fumio Sano: Do-Hideo No 48-50003-09 fi / J many Y 2 2 · 'υ-AIIQ
no] :; ":: (-J 422 scrap 2 孝 ¥ 7-7 / ° z7 ・ ゝ ¥ / ¥) ′ ′ To 48-50003-10ty, caster ···· 1222 ′
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646 me □-58-5803 1 1 11! I don't know JflllllallllA. 2. -'6, Inventors other than the above,
utility model registration applicant or agent (1) Inventor's name, name, address! , T "Name, 3- to
1: 1: r" "Address; 2 Name <2) Utility Model Registration Applicant Address (Destination) Name
(Name) Representative δ Address (Destination) Name (Name t! 2) Representative address 3)
Agent address, Uchiyukicho, Chiyoda-ku, Tokyo, 1-1 Iino Building 〒 100, P / kQ, 4, 1-2 Jl +) Il,
Q1. :) 317, 4. (Lt- ;, =);